Decoding JWT tokens — header and payload.
JWT (JSON Web Token) is a standard for passing signed data between parties, often used for authentication. This tool decodes the header and payload of a token locally in the browser, without checking the signature or sending data anywhere.
No, this tool only decodes the content, it does not validate the signature — that requires a secret key, which should not be shared with the browser.
Yes, all processing happens locally, the token is never sent anywhere.
Check that you have copied the entire token, including all three parts separated by dots.